TY  - JOUR
AU  - M. T. Teryokhin
TI  - Nonzero Periodic Solutions of Nonlinear Systems of Ordinary Differential Equations with a Singular Matrix Multiplying the Derivatives
JO  - Differencialʹnye uravneniâ
PY  - 2003
SP  - 1645
EP  - 1653
VL  - 39
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2003_39_12_a7/
LA  - ru
ID  - DE_2003_39_12_a7
ER  -